天然牙脱落后的下牙槽嵴不断吸收,给修复医生和口腔外科的治疗都造成了困难。骨丧失减少了义齿支持面积,导致义齿稳定性降低。口腔外科方面在重建吸收的下颌牙槽嵴方面已有很多成功,但早期所用的植骨下颌增大术,主要缺点是术后骨迅速的重吸收。Kent等用无孔、颗粒型、不吸收的HA作下颌牙槽嵴的增大,HA是组织相容性的,免除了病人取骨的二次手术野,有些人认为它与其下面的骨形成直接的骨性连接,并因不吸收,牙槽嵴高度可维持较长时期,可以成为义齿的良好支持。HA上面的组织裂开较少,咀嚼压力造成的疼痛也不常见,病员满意,同时手术可在门诊完成。Kent等推荐HA可与松质骨碎屑混合使用,通过骨膜 Continued absorption of the lower alveolar ridge after tooth loss has caused difficulties for both the surgeon and the oral surgeon. Loss of bone reduces denture support area, resulting in reduced stability of the denture. Oral surgery has had many successes in reconstructing the mandibular alveolar ridge that has been absorbed, but the early use of bone grafting augmentation has the major drawback of rapid postoperative bone resorption. Kent and other non-porous, particulate, non-absorption of HA for mandibular alveolar crest increases, HA is histocompatible, eliminating the patient's bone surgery secondary surgery, and some people think it with the formation of bone below Direct bone connection, and because of non-absorption, alveolar ridge height can be maintained for a long period of time, can be a good support for the denture. HA tissue above the split less chewing pressure caused by the pain is not common, the patient satisfied, while surgery can be done in the clinic. Kent et al recommend that HA be mixed with cancellous bone debris through the periosteum